To view incoming SMS messages to your number and forward incoming messages to emails and other phones, click on the 'SMS' tab when viewing your phone number:
Once on the SMS tab, you will see this number's SMS panel:
Add Forwarding numbers by entering them into the input and hitting 'enter'. You can add as many numbers and emails as you'd like.
Forwarded SMS messages will come in the following format:
Incoming SMS Message [*from_phone_number*]
*message*
Be sure to click the 'Update Number' button after you enter your notification numbers and emails.